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| author | David Howells <dhowells@redhat.com> | 2013-08-30 16:07:37 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2013-09-25 17:17:01 +0100 |
| commit | 008643b86c5f33c115c84ccdda1725cac3ad50ad (patch) | |
| tree | 951ea0d3d7b84ce3570da17f03f45a53f3e4b35d /security/keys/key.c | |
| parent | b56e5a17b6b9acd16997960504b9940d0d7984e7 (diff) | |
| download | linux-008643b86c5f33c115c84ccdda1725cac3ad50ad.tar.gz linux-008643b86c5f33c115c84ccdda1725cac3ad50ad.tar.bz2 linux-008643b86c5f33c115c84ccdda1725cac3ad50ad.zip | |
KEYS: Add a 'trusted' flag and a 'trusted only' flag
Add KEY_FLAG_TRUSTED to indicate that a key either comes from a trusted source
or had a cryptographic signature chain that led back to a trusted key the
kernel already possessed.
Add KEY_FLAGS_TRUSTED_ONLY to indicate that a keyring will only accept links to
keys marked with KEY_FLAGS_TRUSTED.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'security/keys/key.c')
| -rw-r--r-- | security/keys/key.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/security/keys/key.c b/security/keys/key.c index a819b5c7d4ec..d331ea9ef380 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -300,6 +300,8 @@ struct key *key_alloc(struct key_type *type, const char *desc, if (!(flags & KEY_ALLOC_NOT_IN_QUOTA)) key->flags |= 1 << KEY_FLAG_IN_QUOTA; + if (flags & KEY_ALLOC_TRUSTED) + key->flags |= 1 << KEY_FLAG_TRUSTED; memset(&key->type_data, 0, sizeof(key->type_data)); @@ -813,6 +815,7 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref, prep.data = payload; prep.datalen = plen; prep.quotalen = index_key.type->def_datalen; + prep.trusted = flags & KEY_ALLOC_TRUSTED; if (index_key.type->preparse) { ret = index_key.type->preparse(&prep); if (ret < 0) { @@ -827,6 +830,11 @@ key_ref_t key_create_or_update(key_ref_t keyring_ref, } index_key.desc_len = strlen(index_key.description); + key_ref = ERR_PTR(-EPERM); + if (!prep.trusted && test_bit(KEY_FLAG_TRUSTED_ONLY, &keyring->flags)) + goto error_free_prep; + flags |= prep.trusted ? KEY_ALLOC_TRUSTED : 0; + ret = __key_link_begin(keyring, &index_key, &edit); if (ret < 0) { key_ref = ERR_PTR(ret); |